Solder for aluminum



Patented Nov. 13, 1928."

so s'rarss OSKAB SPENGLER, 0F DESSA'U' IN ANHALT, GERMANY, ASSIGN'OR TOI. G. FARIBENIN- DUSTRIE AKTIENGESELLSCHAFT, OF FRANKFURT, GERMANY.

SOLDIER FOR ALUMINUM.

No Drawing. Application filed July 13, 1925, Serial No. 43,399, and inGermany September 24, 1924.

is minimized by the use of alloys of' aluminum and silicon as solder foraluminum. Preferably an alloy which contains 515% of silicon is applied.The difference of electric potential between such alloys faces whichcomprisesapplying to the surfaces a molten flux comprising about 85- 95%aluminum and about five to fifteen percent silicon.

In testimony whereof I aflix my signature.

OSKAR SPENGLER.

